com.google.wave.splash.rpc.WaveServiceAdapter.java Source code

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Here is the source code for com.google.wave.splash.rpc.WaveServiceAdapter.java

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/**
 * Copyright 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package com.google.wave.splash.rpc;

import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.name.Named;
import com.google.wave.api.WaveService;
import com.google.wave.api.Wavelet;
import com.google.wave.splash.auth.SessionContext;
import com.google.wave.splash.auth.oauth.OAuthSessionContext;

import net.oauth.OAuthAccessor;

import org.waveprotocol.wave.model.id.WaveId;
import org.waveprotocol.wave.model.id.WaveletId;

import java.io.IOException;

/**
 * Fetches wavelets using the Google Wave Robot API {@code WaveService} interface.
 * 
 * @author anthonybaxter@gmail.com (Anthony Baxter)
 */
public class WaveServiceAdapter implements RemoteWaveService {

    private final WaveService waveService;
    private final String rpcEndpoint;

    public WaveServiceAdapter(WaveService waveService, String rpcEndpoint) {
        this.waveService = waveService;
        this.rpcEndpoint = rpcEndpoint;
    }

    @Override
    public ListenableFuture<Wavelet> fetchWavelet(WaveId waveId, WaveletId waveletId) {
        try {
            return Futures.immediateFuture(waveService.fetchWavelet(waveId, waveletId, rpcEndpoint));
        } catch (IOException e) {
            return Futures.immediateFailedFuture(e);
        }
    }

    /**
     * Factory for creating WaveService objects.
     */
    public static class WaveServiceProvider implements Provider<RemoteWaveService> {

        private final Provider<SessionContext> sessionContext;
        private final String rpcEndpoint;

        @Inject
        public WaveServiceProvider(Provider<SessionContext> sessionContext,
                @Named("rpcEndpointUrl") String rpcEndpoint) {
            this.sessionContext = sessionContext;
            this.rpcEndpoint = rpcEndpoint;
        }

        @Override
        public RemoteWaveService get() {
            OAuthSessionContext oAuthSessionContext = (OAuthSessionContext) sessionContext.get();
            OAuthAccessor accessor = oAuthSessionContext.getAccessor();
            WaveService waveService = new WaveService();
            waveService.setupOAuth(accessor, rpcEndpoint);
            return new WaveServiceAdapter(waveService, rpcEndpoint);
        }
    }
}